Holds the current status
of the trace start/stop resource. If set to 1, it indicates that
a trace start address has been matched, without
a corresponding trace stop address match.

[1]

RO

Indicates the current effective value
of ProgBit, bit [10] of the ETMCR. You must wait for this bit to
go to 1 before you start to program the PTM. See Programming bit
and associated state.

If
you read other bits in the ETMSR while this bit is 0, some instructions
might not have taken effect. ARM recommends that you set the Programming
bit to 1 and then wait for this bit to go to 1 before interpreting
any other values in this register or reading any other register.

This
bit remains 0 while there is any data in the FIFO. This ensures
that the FIFO is empty before you can reprogram the PTM.

Note

From PFT v1.1, this bit is set when OS Lock is also set.

[0]

RO

If set to 1, there is an overflow that
has not yet been traced. This bit is cleared to 0 when either:

trace is restarted

the PTM Power Down bit, bit [0] of the Main Control
Register, 0x000, is set to 1.

Note

Setting or clearing the Programming bit, ProgBit, does not
clear this bit to 0.